What role do humic acids play in the cycling of matter and the transformation of energy within soil ecosystems?
Release Date:
2021-04-22
What role do humic acids play in the material cycling and energy transformation processes of soil ecosystems? Humic acids are macromolecular organic substances that are widely present in nature and are extensively utilized across numerous sectors, including agriculture, forestry, animal husbandry, petroleum, chemical engineering, construction materials, medicine and health, and environmental protection—spanning dozens of industries.
What role does humic acid play in the cycling of matter and the transformation of energy within soil ecosystems? Humic acid is a widely occurring macromolecular organic substance found in nature, with applications spanning agriculture, forestry, animal husbandry, petroleum, chemical engineering, construction materials, medicine and health, and environmental protection—covering dozens of industries. In particular, the current emphasis on developing ecological agriculture, producing pollution-free agricultural products, cultivating green foods, and manufacturing environmentally friendly, non‑polluting goods has further elevated the status of humic acid. Indeed, evidence demonstrates that human life and survival are inseparable from humic acid.
Humic acids play an important role in the cycling of matter and the transformation of energy within soil ecosystems.
1. Humic acid is an active participant and enhancer in soil formation and soil fertility.
2. Humic acids influence the soil’s water-holding capacity;
3. Humic acids both promote and constrain the migration, immobilization, and leaching of soil metal ions and trace elements.
4. Humic acids influence the soil’s base exchange capacity;
5. Humic acid is a stabilizer of soil structure;
6. Humic acid is a reservoir of plant-derived organic matter.
Humic acid can be regarded as a crucial prokaryotic component that underpins soil life. During soil formation, humic acid interacts with organic macromolecules secreted by various microorganisms, clay minerals, and iron and aluminum hydroxides, combining through diverse mechanisms and forces to give rise to a range of organic–inorganic complexes, macroaggregates, and microaggregates. Among these, microaggregates represent the smallest structural units capable of functioning independently; they constitute the core of soil structure, analogous to cells within the soil.
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